PD Detector

PD Detector – Partial Discharge Detector

A Partial Discharge (PD) Detector is a specialized diagnostic instrument designed to identify, measure, and locate partial discharge activity in high-voltage electrical systems. PD detection is essential for assessing insulation health and preventing equipment failures in transformers, switchgear, cables, and other HV assets.

The device helps engineers and maintenance teams detect early-stage insulation defects such as voids, cracks, moisture ingress, and surface tracking—allowing timely maintenance, reducing downtime, and improving electrical system reliability.

Key Features

  • High Sensitivity Detection: Accurately measures ultrasonic or UHF signals generated by partial discharge activity.

  • Real-Time Monitoring: Provides immediate visual and audio feedback for faster diagnosis.

  • Non-Contact Measurement: Detects PD without shutting down equipment, ideal for live inspections.

  • Wide Application Range: Suitable for transformers, GIS, switchgear, overhead lines, cable terminations, and more.

  • Data Logging & Analysis: Many models include storage, spectrum analysis, and reporting functions.

  • Portable & Easy to Use: Lightweight design with ergonomic grip for field inspections.

    Typical Applications

    • Predictive and preventive maintenance

    • High-voltage substation inspections

    • Transformer condition assessment

    • Switchgear PD monitoring

    • Cable termination and joint evaluation

    • Industrial electrical reliability testing